Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas...
[linux-2.6.git] / drivers / net / usb / smsc95xx.c
1  /***************************************************************************
2  *
3  * Copyright (C) 2007-2008 SMSC
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * as published by the Free Software Foundation; either version 2
8  * of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18  *
19  *****************************************************************************/
20
21 #include <linux/module.h>
22 #include <linux/kmod.h>
23 #include <linux/init.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/mii.h>
28 #include <linux/usb.h>
29 #include <linux/crc32.h>
30 #include <linux/usb/usbnet.h>
31 #include <linux/slab.h>
32 #include "smsc95xx.h"
33
34 #define SMSC_CHIPNAME                   "smsc95xx"
35 #define SMSC_DRIVER_VERSION             "1.0.4"
36 #define HS_USB_PKT_SIZE                 (512)
37 #define FS_USB_PKT_SIZE                 (64)
38 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
39 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
40 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
41 #define MAX_SINGLE_PACKET_SIZE          (2048)
42 #define LAN95XX_EEPROM_MAGIC            (0x9500)
43 #define EEPROM_MAC_OFFSET               (0x01)
44 #define DEFAULT_TX_CSUM_ENABLE          (true)
45 #define DEFAULT_RX_CSUM_ENABLE          (true)
46 #define SMSC95XX_INTERNAL_PHY_ID        (1)
47 #define SMSC95XX_TX_OVERHEAD            (8)
48 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
49
50 struct smsc95xx_priv {
51         u32 mac_cr;
52         u32 hash_hi;
53         u32 hash_lo;
54         spinlock_t mac_cr_lock;
55         bool use_tx_csum;
56         bool use_rx_csum;
57 };
58
59 struct usb_context {
60         struct usb_ctrlrequest req;
61         struct usbnet *dev;
62 };
63
64 static int turbo_mode = true;
65 module_param(turbo_mode, bool, 0644);
66 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
67
68 static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data)
69 {
70         u32 *buf = kmalloc(4, GFP_KERNEL);
71         int ret;
72
73         BUG_ON(!dev);
74
75         if (!buf)
76                 return -ENOMEM;
77
78         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
79                 USB_VENDOR_REQUEST_READ_REGISTER,
80                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
81                 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
82
83         if (unlikely(ret < 0))
84                 netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
85
86         le32_to_cpus(buf);
87         *data = *buf;
88         kfree(buf);
89
90         return ret;
91 }
92
93 static int smsc95xx_write_reg(struct usbnet *dev, u32 index, u32 data)
94 {
95         u32 *buf = kmalloc(4, GFP_KERNEL);
96         int ret;
97
98         BUG_ON(!dev);
99
100         if (!buf)
101                 return -ENOMEM;
102
103         *buf = data;
104         cpu_to_le32s(buf);
105
106         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
107                 USB_VENDOR_REQUEST_WRITE_REGISTER,
108                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
109                 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
110
111         if (unlikely(ret < 0))
112                 netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
113
114         kfree(buf);
115
116         return ret;
117 }
118
119 /* Loop until the read is completed with timeout
120  * called with phy_mutex held */
121 static int smsc95xx_phy_wait_not_busy(struct usbnet *dev)
122 {
123         unsigned long start_time = jiffies;
124         u32 val;
125
126         do {
127                 smsc95xx_read_reg(dev, MII_ADDR, &val);
128                 if (!(val & MII_BUSY_))
129                         return 0;
130         } while (!time_after(jiffies, start_time + HZ));
131
132         return -EIO;
133 }
134
135 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
136 {
137         struct usbnet *dev = netdev_priv(netdev);
138         u32 val, addr;
139
140         mutex_lock(&dev->phy_mutex);
141
142         /* confirm MII not busy */
143         if (smsc95xx_phy_wait_not_busy(dev)) {
144                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
145                 mutex_unlock(&dev->phy_mutex);
146                 return -EIO;
147         }
148
149         /* set the address, index & direction (read from PHY) */
150         phy_id &= dev->mii.phy_id_mask;
151         idx &= dev->mii.reg_num_mask;
152         addr = (phy_id << 11) | (idx << 6) | MII_READ_;
153         smsc95xx_write_reg(dev, MII_ADDR, addr);
154
155         if (smsc95xx_phy_wait_not_busy(dev)) {
156                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
157                 mutex_unlock(&dev->phy_mutex);
158                 return -EIO;
159         }
160
161         smsc95xx_read_reg(dev, MII_DATA, &val);
162
163         mutex_unlock(&dev->phy_mutex);
164
165         return (u16)(val & 0xFFFF);
166 }
167
168 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
169                                 int regval)
170 {
171         struct usbnet *dev = netdev_priv(netdev);
172         u32 val, addr;
173
174         mutex_lock(&dev->phy_mutex);
175
176         /* confirm MII not busy */
177         if (smsc95xx_phy_wait_not_busy(dev)) {
178                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
179                 mutex_unlock(&dev->phy_mutex);
180                 return;
181         }
182
183         val = regval;
184         smsc95xx_write_reg(dev, MII_DATA, val);
185
186         /* set the address, index & direction (write to PHY) */
187         phy_id &= dev->mii.phy_id_mask;
188         idx &= dev->mii.reg_num_mask;
189         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
190         smsc95xx_write_reg(dev, MII_ADDR, addr);
191
192         if (smsc95xx_phy_wait_not_busy(dev))
193                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
194
195         mutex_unlock(&dev->phy_mutex);
196 }
197
198 static int smsc95xx_wait_eeprom(struct usbnet *dev)
199 {
200         unsigned long start_time = jiffies;
201         u32 val;
202
203         do {
204                 smsc95xx_read_reg(dev, E2P_CMD, &val);
205                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
206                         break;
207                 udelay(40);
208         } while (!time_after(jiffies, start_time + HZ));
209
210         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
211                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
212                 return -EIO;
213         }
214
215         return 0;
216 }
217
218 static int smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
219 {
220         unsigned long start_time = jiffies;
221         u32 val;
222
223         do {
224                 smsc95xx_read_reg(dev, E2P_CMD, &val);
225
226                 if (!(val & E2P_CMD_BUSY_))
227                         return 0;
228
229                 udelay(40);
230         } while (!time_after(jiffies, start_time + HZ));
231
232         netdev_warn(dev->net, "EEPROM is busy\n");
233         return -EIO;
234 }
235
236 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
237                                 u8 *data)
238 {
239         u32 val;
240         int i, ret;
241
242         BUG_ON(!dev);
243         BUG_ON(!data);
244
245         ret = smsc95xx_eeprom_confirm_not_busy(dev);
246         if (ret)
247                 return ret;
248
249         for (i = 0; i < length; i++) {
250                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
251                 smsc95xx_write_reg(dev, E2P_CMD, val);
252
253                 ret = smsc95xx_wait_eeprom(dev);
254                 if (ret < 0)
255                         return ret;
256
257                 smsc95xx_read_reg(dev, E2P_DATA, &val);
258
259                 data[i] = val & 0xFF;
260                 offset++;
261         }
262
263         return 0;
264 }
265
266 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
267                                  u8 *data)
268 {
269         u32 val;
270         int i, ret;
271
272         BUG_ON(!dev);
273         BUG_ON(!data);
274
275         ret = smsc95xx_eeprom_confirm_not_busy(dev);
276         if (ret)
277                 return ret;
278
279         /* Issue write/erase enable command */
280         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
281         smsc95xx_write_reg(dev, E2P_CMD, val);
282
283         ret = smsc95xx_wait_eeprom(dev);
284         if (ret < 0)
285                 return ret;
286
287         for (i = 0; i < length; i++) {
288
289                 /* Fill data register */
290                 val = data[i];
291                 smsc95xx_write_reg(dev, E2P_DATA, val);
292
293                 /* Send "write" command */
294                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
295                 smsc95xx_write_reg(dev, E2P_CMD, val);
296
297                 ret = smsc95xx_wait_eeprom(dev);
298                 if (ret < 0)
299                         return ret;
300
301                 offset++;
302         }
303
304         return 0;
305 }
306
307 static void smsc95xx_async_cmd_callback(struct urb *urb)
308 {
309         struct usb_context *usb_context = urb->context;
310         struct usbnet *dev = usb_context->dev;
311         int status = urb->status;
312
313         if (status < 0)
314                 netdev_warn(dev->net, "async callback failed with %d\n", status);
315
316         kfree(usb_context);
317         usb_free_urb(urb);
318 }
319
320 static int smsc95xx_write_reg_async(struct usbnet *dev, u16 index, u32 *data)
321 {
322         struct usb_context *usb_context;
323         int status;
324         struct urb *urb;
325         const u16 size = 4;
326
327         urb = usb_alloc_urb(0, GFP_ATOMIC);
328         if (!urb) {
329                 netdev_warn(dev->net, "Error allocating URB\n");
330                 return -ENOMEM;
331         }
332
333         usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
334         if (usb_context == NULL) {
335                 netdev_warn(dev->net, "Error allocating control msg\n");
336                 usb_free_urb(urb);
337                 return -ENOMEM;
338         }
339
340         usb_context->req.bRequestType =
341                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
342         usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
343         usb_context->req.wValue = 00;
344         usb_context->req.wIndex = cpu_to_le16(index);
345         usb_context->req.wLength = cpu_to_le16(size);
346
347         usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
348                 (void *)&usb_context->req, data, size,
349                 smsc95xx_async_cmd_callback,
350                 (void *)usb_context);
351
352         status = usb_submit_urb(urb, GFP_ATOMIC);
353         if (status < 0) {
354                 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
355                             status);
356                 kfree(usb_context);
357                 usb_free_urb(urb);
358         }
359
360         return status;
361 }
362
363 /* returns hash bit number for given MAC address
364  * example:
365  * 01 00 5E 00 00 01 -> returns bit number 31 */
366 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
367 {
368         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
369 }
370
371 static void smsc95xx_set_multicast(struct net_device *netdev)
372 {
373         struct usbnet *dev = netdev_priv(netdev);
374         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
375         unsigned long flags;
376
377         pdata->hash_hi = 0;
378         pdata->hash_lo = 0;
379
380         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
381
382         if (dev->net->flags & IFF_PROMISC) {
383                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
384                 pdata->mac_cr |= MAC_CR_PRMS_;
385                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
386         } else if (dev->net->flags & IFF_ALLMULTI) {
387                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
388                 pdata->mac_cr |= MAC_CR_MCPAS_;
389                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
390         } else if (!netdev_mc_empty(dev->net)) {
391                 struct netdev_hw_addr *ha;
392
393                 pdata->mac_cr |= MAC_CR_HPFILT_;
394                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
395
396                 netdev_for_each_mc_addr(ha, netdev) {
397                         u32 bitnum = smsc95xx_hash(ha->addr);
398                         u32 mask = 0x01 << (bitnum & 0x1F);
399                         if (bitnum & 0x20)
400                                 pdata->hash_hi |= mask;
401                         else
402                                 pdata->hash_lo |= mask;
403                 }
404
405                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
406                                    pdata->hash_hi, pdata->hash_lo);
407         } else {
408                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
409                 pdata->mac_cr &=
410                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
411         }
412
413         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
414
415         /* Initiate async writes, as we can't wait for completion here */
416         smsc95xx_write_reg_async(dev, HASHH, &pdata->hash_hi);
417         smsc95xx_write_reg_async(dev, HASHL, &pdata->hash_lo);
418         smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
419 }
420
421 static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
422                                             u16 lcladv, u16 rmtadv)
423 {
424         u32 flow, afc_cfg = 0;
425
426         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
427         if (ret < 0) {
428                 netdev_warn(dev->net, "error reading AFC_CFG\n");
429                 return;
430         }
431
432         if (duplex == DUPLEX_FULL) {
433                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
434
435                 if (cap & FLOW_CTRL_RX)
436                         flow = 0xFFFF0002;
437                 else
438                         flow = 0;
439
440                 if (cap & FLOW_CTRL_TX)
441                         afc_cfg |= 0xF;
442                 else
443                         afc_cfg &= ~0xF;
444
445                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
446                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
447                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
448         } else {
449                 netif_dbg(dev, link, dev->net, "half duplex\n");
450                 flow = 0;
451                 afc_cfg |= 0xF;
452         }
453
454         smsc95xx_write_reg(dev, FLOW, flow);
455         smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
456 }
457
458 static int smsc95xx_link_reset(struct usbnet *dev)
459 {
460         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
461         struct mii_if_info *mii = &dev->mii;
462         struct ethtool_cmd ecmd;
463         unsigned long flags;
464         u16 lcladv, rmtadv;
465         u32 intdata;
466
467         /* clear interrupt status */
468         smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
469         intdata = 0xFFFFFFFF;
470         smsc95xx_write_reg(dev, INT_STS, intdata);
471
472         mii_check_media(mii, 1, 1);
473         mii_ethtool_gset(&dev->mii, &ecmd);
474         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
475         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
476
477         netif_dbg(dev, link, dev->net, "speed: %d duplex: %d lcladv: %04x rmtadv: %04x\n",
478                   ecmd.speed, ecmd.duplex, lcladv, rmtadv);
479
480         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
481         if (ecmd.duplex != DUPLEX_FULL) {
482                 pdata->mac_cr &= ~MAC_CR_FDPX_;
483                 pdata->mac_cr |= MAC_CR_RCVOWN_;
484         } else {
485                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
486                 pdata->mac_cr |= MAC_CR_FDPX_;
487         }
488         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
489
490         smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
491
492         smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
493
494         return 0;
495 }
496
497 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
498 {
499         u32 intdata;
500
501         if (urb->actual_length != 4) {
502                 netdev_warn(dev->net, "unexpected urb length %d\n",
503                             urb->actual_length);
504                 return;
505         }
506
507         memcpy(&intdata, urb->transfer_buffer, 4);
508         le32_to_cpus(&intdata);
509
510         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
511
512         if (intdata & INT_ENP_PHY_INT_)
513                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
514         else
515                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
516                             intdata);
517 }
518
519 /* Enable or disable Tx & Rx checksum offload engines */
520 static int smsc95xx_set_csums(struct usbnet *dev)
521 {
522         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
523         u32 read_buf;
524         int ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
525         if (ret < 0) {
526                 netdev_warn(dev->net, "Failed to read COE_CR: %d\n", ret);
527                 return ret;
528         }
529
530         if (pdata->use_tx_csum)
531                 read_buf |= Tx_COE_EN_;
532         else
533                 read_buf &= ~Tx_COE_EN_;
534
535         if (pdata->use_rx_csum)
536                 read_buf |= Rx_COE_EN_;
537         else
538                 read_buf &= ~Rx_COE_EN_;
539
540         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
541         if (ret < 0) {
542                 netdev_warn(dev->net, "Failed to write COE_CR: %d\n", ret);
543                 return ret;
544         }
545
546         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
547         return 0;
548 }
549
550 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
551 {
552         return MAX_EEPROM_SIZE;
553 }
554
555 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
556                                        struct ethtool_eeprom *ee, u8 *data)
557 {
558         struct usbnet *dev = netdev_priv(netdev);
559
560         ee->magic = LAN95XX_EEPROM_MAGIC;
561
562         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
563 }
564
565 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
566                                        struct ethtool_eeprom *ee, u8 *data)
567 {
568         struct usbnet *dev = netdev_priv(netdev);
569
570         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
571                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
572                             ee->magic);
573                 return -EINVAL;
574         }
575
576         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
577 }
578
579 static u32 smsc95xx_ethtool_get_rx_csum(struct net_device *netdev)
580 {
581         struct usbnet *dev = netdev_priv(netdev);
582         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
583
584         return pdata->use_rx_csum;
585 }
586
587 static int smsc95xx_ethtool_set_rx_csum(struct net_device *netdev, u32 val)
588 {
589         struct usbnet *dev = netdev_priv(netdev);
590         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
591
592         pdata->use_rx_csum = !!val;
593
594         return smsc95xx_set_csums(dev);
595 }
596
597 static u32 smsc95xx_ethtool_get_tx_csum(struct net_device *netdev)
598 {
599         struct usbnet *dev = netdev_priv(netdev);
600         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
601
602         return pdata->use_tx_csum;
603 }
604
605 static int smsc95xx_ethtool_set_tx_csum(struct net_device *netdev, u32 val)
606 {
607         struct usbnet *dev = netdev_priv(netdev);
608         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
609
610         pdata->use_tx_csum = !!val;
611
612         ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
613         return smsc95xx_set_csums(dev);
614 }
615
616 static const struct ethtool_ops smsc95xx_ethtool_ops = {
617         .get_link       = usbnet_get_link,
618         .nway_reset     = usbnet_nway_reset,
619         .get_drvinfo    = usbnet_get_drvinfo,
620         .get_msglevel   = usbnet_get_msglevel,
621         .set_msglevel   = usbnet_set_msglevel,
622         .get_settings   = usbnet_get_settings,
623         .set_settings   = usbnet_set_settings,
624         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
625         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
626         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
627         .get_tx_csum    = smsc95xx_ethtool_get_tx_csum,
628         .set_tx_csum    = smsc95xx_ethtool_set_tx_csum,
629         .get_rx_csum    = smsc95xx_ethtool_get_rx_csum,
630         .set_rx_csum    = smsc95xx_ethtool_set_rx_csum,
631 };
632
633 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
634 {
635         struct usbnet *dev = netdev_priv(netdev);
636
637         if (!netif_running(netdev))
638                 return -EINVAL;
639
640         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
641 }
642
643 static void smsc95xx_init_mac_address(struct usbnet *dev)
644 {
645         /* try reading mac address from EEPROM */
646         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
647                         dev->net->dev_addr) == 0) {
648                 if (is_valid_ether_addr(dev->net->dev_addr)) {
649                         /* eeprom values are valid so use them */
650                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
651                         return;
652                 }
653         }
654
655         /* no eeprom, or eeprom values are invalid. generate random MAC */
656         random_ether_addr(dev->net->dev_addr);
657         netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr\n");
658 }
659
660 static int smsc95xx_set_mac_address(struct usbnet *dev)
661 {
662         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
663                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
664         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
665         int ret;
666
667         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
668         if (ret < 0) {
669                 netdev_warn(dev->net, "Failed to write ADDRL: %d\n", ret);
670                 return ret;
671         }
672
673         ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
674         if (ret < 0) {
675                 netdev_warn(dev->net, "Failed to write ADDRH: %d\n", ret);
676                 return ret;
677         }
678
679         return 0;
680 }
681
682 /* starts the TX path */
683 static void smsc95xx_start_tx_path(struct usbnet *dev)
684 {
685         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
686         unsigned long flags;
687         u32 reg_val;
688
689         /* Enable Tx at MAC */
690         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
691         pdata->mac_cr |= MAC_CR_TXEN_;
692         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
693
694         smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
695
696         /* Enable Tx at SCSRs */
697         reg_val = TX_CFG_ON_;
698         smsc95xx_write_reg(dev, TX_CFG, reg_val);
699 }
700
701 /* Starts the Receive path */
702 static void smsc95xx_start_rx_path(struct usbnet *dev)
703 {
704         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
705         unsigned long flags;
706
707         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
708         pdata->mac_cr |= MAC_CR_RXEN_;
709         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
710
711         smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
712 }
713
714 static int smsc95xx_phy_initialize(struct usbnet *dev)
715 {
716         int bmcr, timeout = 0;
717
718         /* Initialize MII structure */
719         dev->mii.dev = dev->net;
720         dev->mii.mdio_read = smsc95xx_mdio_read;
721         dev->mii.mdio_write = smsc95xx_mdio_write;
722         dev->mii.phy_id_mask = 0x1f;
723         dev->mii.reg_num_mask = 0x1f;
724         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
725
726         /* reset phy and wait for reset to complete */
727         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
728
729         do {
730                 msleep(10);
731                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
732                 timeout++;
733         } while ((bmcr & BMCR_RESET) && (timeout < 100));
734
735         if (timeout >= 100) {
736                 netdev_warn(dev->net, "timeout on PHY Reset");
737                 return -EIO;
738         }
739
740         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
741                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
742                 ADVERTISE_PAUSE_ASYM);
743
744         /* read to clear */
745         smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
746
747         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
748                 PHY_INT_MASK_DEFAULT_);
749         mii_nway_restart(&dev->mii);
750
751         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
752         return 0;
753 }
754
755 static int smsc95xx_reset(struct usbnet *dev)
756 {
757         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
758         struct net_device *netdev = dev->net;
759         u32 read_buf, write_buf, burst_cap;
760         int ret = 0, timeout;
761
762         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
763
764         write_buf = HW_CFG_LRST_;
765         ret = smsc95xx_write_reg(dev, HW_CFG, write_buf);
766         if (ret < 0) {
767                 netdev_warn(dev->net, "Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = %d\n",
768                             ret);
769                 return ret;
770         }
771
772         timeout = 0;
773         do {
774                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
775                 if (ret < 0) {
776                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
777                         return ret;
778                 }
779                 msleep(10);
780                 timeout++;
781         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
782
783         if (timeout >= 100) {
784                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
785                 return ret;
786         }
787
788         write_buf = PM_CTL_PHY_RST_;
789         ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf);
790         if (ret < 0) {
791                 netdev_warn(dev->net, "Failed to write PM_CTRL: %d\n", ret);
792                 return ret;
793         }
794
795         timeout = 0;
796         do {
797                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
798                 if (ret < 0) {
799                         netdev_warn(dev->net, "Failed to read PM_CTRL: %d\n", ret);
800                         return ret;
801                 }
802                 msleep(10);
803                 timeout++;
804         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
805
806         if (timeout >= 100) {
807                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
808                 return ret;
809         }
810
811         ret = smsc95xx_set_mac_address(dev);
812         if (ret < 0)
813                 return ret;
814
815         netif_dbg(dev, ifup, dev->net,
816                   "MAC Address: %pM\n", dev->net->dev_addr);
817
818         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
819         if (ret < 0) {
820                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
821                 return ret;
822         }
823
824         netif_dbg(dev, ifup, dev->net,
825                   "Read Value from HW_CFG : 0x%08x\n", read_buf);
826
827         read_buf |= HW_CFG_BIR_;
828
829         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
830         if (ret < 0) {
831                 netdev_warn(dev->net, "Failed to write HW_CFG_BIR_ bit in HW_CFG register, ret = %d\n",
832                             ret);
833                 return ret;
834         }
835
836         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
837         if (ret < 0) {
838                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
839                 return ret;
840         }
841         netif_dbg(dev, ifup, dev->net,
842                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
843                   read_buf);
844
845         if (!turbo_mode) {
846                 burst_cap = 0;
847                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
848         } else if (dev->udev->speed == USB_SPEED_HIGH) {
849                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
850                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
851         } else {
852                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
853                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
854         }
855
856         netif_dbg(dev, ifup, dev->net,
857                   "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
858
859         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
860         if (ret < 0) {
861                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
862                 return ret;
863         }
864
865         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
866         if (ret < 0) {
867                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
868                 return ret;
869         }
870         netif_dbg(dev, ifup, dev->net,
871                   "Read Value from BURST_CAP after writing: 0x%08x\n",
872                   read_buf);
873
874         read_buf = DEFAULT_BULK_IN_DELAY;
875         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
876         if (ret < 0) {
877                 netdev_warn(dev->net, "ret = %d\n", ret);
878                 return ret;
879         }
880
881         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
882         if (ret < 0) {
883                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
884                 return ret;
885         }
886         netif_dbg(dev, ifup, dev->net,
887                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
888                   read_buf);
889
890         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
891         if (ret < 0) {
892                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
893                 return ret;
894         }
895         netif_dbg(dev, ifup, dev->net,
896                   "Read Value from HW_CFG: 0x%08x\n", read_buf);
897
898         if (turbo_mode)
899                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
900
901         read_buf &= ~HW_CFG_RXDOFF_;
902
903         /* set Rx data offset=2, Make IP header aligns on word boundary. */
904         read_buf |= NET_IP_ALIGN << 9;
905
906         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
907         if (ret < 0) {
908                 netdev_warn(dev->net, "Failed to write HW_CFG register, ret=%d\n",
909                             ret);
910                 return ret;
911         }
912
913         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
914         if (ret < 0) {
915                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
916                 return ret;
917         }
918         netif_dbg(dev, ifup, dev->net,
919                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
920
921         write_buf = 0xFFFFFFFF;
922         ret = smsc95xx_write_reg(dev, INT_STS, write_buf);
923         if (ret < 0) {
924                 netdev_warn(dev->net, "Failed to write INT_STS register, ret=%d\n",
925                             ret);
926                 return ret;
927         }
928
929         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
930         if (ret < 0) {
931                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
932                 return ret;
933         }
934         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
935
936         /* Configure GPIO pins as LED outputs */
937         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
938                 LED_GPIO_CFG_FDX_LED;
939         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
940         if (ret < 0) {
941                 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG register, ret=%d\n",
942                             ret);
943                 return ret;
944         }
945
946         /* Init Tx */
947         write_buf = 0;
948         ret = smsc95xx_write_reg(dev, FLOW, write_buf);
949         if (ret < 0) {
950                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
951                 return ret;
952         }
953
954         read_buf = AFC_CFG_DEFAULT;
955         ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
956         if (ret < 0) {
957                 netdev_warn(dev->net, "Failed to write AFC_CFG: %d\n", ret);
958                 return ret;
959         }
960
961         /* Don't need mac_cr_lock during initialisation */
962         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
963         if (ret < 0) {
964                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
965                 return ret;
966         }
967
968         /* Init Rx */
969         /* Set Vlan */
970         write_buf = (u32)ETH_P_8021Q;
971         ret = smsc95xx_write_reg(dev, VLAN1, write_buf);
972         if (ret < 0) {
973                 netdev_warn(dev->net, "Failed to write VAN1: %d\n", ret);
974                 return ret;
975         }
976
977         /* Enable or disable checksum offload engines */
978         ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
979         ret = smsc95xx_set_csums(dev);
980         if (ret < 0) {
981                 netdev_warn(dev->net, "Failed to set csum offload: %d\n", ret);
982                 return ret;
983         }
984
985         smsc95xx_set_multicast(dev->net);
986
987         if (smsc95xx_phy_initialize(dev) < 0)
988                 return -EIO;
989
990         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
991         if (ret < 0) {
992                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
993                 return ret;
994         }
995
996         /* enable PHY interrupts */
997         read_buf |= INT_EP_CTL_PHY_INT_;
998
999         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1000         if (ret < 0) {
1001                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1002                 return ret;
1003         }
1004
1005         smsc95xx_start_tx_path(dev);
1006         smsc95xx_start_rx_path(dev);
1007
1008         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1009         return 0;
1010 }
1011
1012 static const struct net_device_ops smsc95xx_netdev_ops = {
1013         .ndo_open               = usbnet_open,
1014         .ndo_stop               = usbnet_stop,
1015         .ndo_start_xmit         = usbnet_start_xmit,
1016         .ndo_tx_timeout         = usbnet_tx_timeout,
1017         .ndo_change_mtu         = usbnet_change_mtu,
1018         .ndo_set_mac_address    = eth_mac_addr,
1019         .ndo_validate_addr      = eth_validate_addr,
1020         .ndo_do_ioctl           = smsc95xx_ioctl,
1021         .ndo_set_multicast_list = smsc95xx_set_multicast,
1022 };
1023
1024 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1025 {
1026         struct smsc95xx_priv *pdata = NULL;
1027         int ret;
1028
1029         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1030
1031         ret = usbnet_get_endpoints(dev, intf);
1032         if (ret < 0) {
1033                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1034                 return ret;
1035         }
1036
1037         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1038                 GFP_KERNEL);
1039
1040         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1041         if (!pdata) {
1042                 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
1043                 return -ENOMEM;
1044         }
1045
1046         spin_lock_init(&pdata->mac_cr_lock);
1047
1048         pdata->use_tx_csum = DEFAULT_TX_CSUM_ENABLE;
1049         pdata->use_rx_csum = DEFAULT_RX_CSUM_ENABLE;
1050
1051         smsc95xx_init_mac_address(dev);
1052
1053         /* Init all registers */
1054         ret = smsc95xx_reset(dev);
1055
1056         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1057         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1058         dev->net->flags |= IFF_MULTICAST;
1059         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD;
1060         return 0;
1061 }
1062
1063 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1064 {
1065         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1066         if (pdata) {
1067                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1068                 kfree(pdata);
1069                 pdata = NULL;
1070                 dev->data[0] = 0;
1071         }
1072 }
1073
1074 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1075 {
1076         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1077         skb->ip_summed = CHECKSUM_COMPLETE;
1078         skb_trim(skb, skb->len - 2);
1079 }
1080
1081 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1082 {
1083         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1084
1085         while (skb->len > 0) {
1086                 u32 header, align_count;
1087                 struct sk_buff *ax_skb;
1088                 unsigned char *packet;
1089                 u16 size;
1090
1091                 memcpy(&header, skb->data, sizeof(header));
1092                 le32_to_cpus(&header);
1093                 skb_pull(skb, 4 + NET_IP_ALIGN);
1094                 packet = skb->data;
1095
1096                 /* get the packet length */
1097                 size = (u16)((header & RX_STS_FL_) >> 16);
1098                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1099
1100                 if (unlikely(header & RX_STS_ES_)) {
1101                         netif_dbg(dev, rx_err, dev->net,
1102                                   "Error header=0x%08x\n", header);
1103                         dev->net->stats.rx_errors++;
1104                         dev->net->stats.rx_dropped++;
1105
1106                         if (header & RX_STS_CRC_) {
1107                                 dev->net->stats.rx_crc_errors++;
1108                         } else {
1109                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1110                                         dev->net->stats.rx_frame_errors++;
1111
1112                                 if ((header & RX_STS_LE_) &&
1113                                         (!(header & RX_STS_FT_)))
1114                                         dev->net->stats.rx_length_errors++;
1115                         }
1116                 } else {
1117                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1118                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1119                                 netif_dbg(dev, rx_err, dev->net,
1120                                           "size err header=0x%08x\n", header);
1121                                 return 0;
1122                         }
1123
1124                         /* last frame in this batch */
1125                         if (skb->len == size) {
1126                                 if (pdata->use_rx_csum)
1127                                         smsc95xx_rx_csum_offload(skb);
1128                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1129                                 skb->truesize = size + sizeof(struct sk_buff);
1130
1131                                 return 1;
1132                         }
1133
1134                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1135                         if (unlikely(!ax_skb)) {
1136                                 netdev_warn(dev->net, "Error allocating skb\n");
1137                                 return 0;
1138                         }
1139
1140                         ax_skb->len = size;
1141                         ax_skb->data = packet;
1142                         skb_set_tail_pointer(ax_skb, size);
1143
1144                         if (pdata->use_rx_csum)
1145                                 smsc95xx_rx_csum_offload(ax_skb);
1146                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1147                         ax_skb->truesize = size + sizeof(struct sk_buff);
1148
1149                         usbnet_skb_return(dev, ax_skb);
1150                 }
1151
1152                 skb_pull(skb, size);
1153
1154                 /* padding bytes before the next frame starts */
1155                 if (skb->len)
1156                         skb_pull(skb, align_count);
1157         }
1158
1159         if (unlikely(skb->len < 0)) {
1160                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1161                 return 0;
1162         }
1163
1164         return 1;
1165 }
1166
1167 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1168 {
1169         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1170         u16 high_16 = low_16 + skb->csum_offset;
1171         return (high_16 << 16) | low_16;
1172 }
1173
1174 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1175                                          struct sk_buff *skb, gfp_t flags)
1176 {
1177         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1178         bool csum = pdata->use_tx_csum && (skb->ip_summed == CHECKSUM_PARTIAL);
1179         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1180         u32 tx_cmd_a, tx_cmd_b;
1181
1182         /* We do not advertise SG, so skbs should be already linearized */
1183         BUG_ON(skb_shinfo(skb)->nr_frags);
1184
1185         if (skb_headroom(skb) < overhead) {
1186                 struct sk_buff *skb2 = skb_copy_expand(skb,
1187                         overhead, 0, flags);
1188                 dev_kfree_skb_any(skb);
1189                 skb = skb2;
1190                 if (!skb)
1191                         return NULL;
1192         }
1193
1194         if (csum) {
1195                 if (skb->len <= 45) {
1196                         /* workaround - hardware tx checksum does not work
1197                          * properly with extremely small packets */
1198                         long csstart = skb_checksum_start_offset(skb);
1199                         __wsum calc = csum_partial(skb->data + csstart,
1200                                 skb->len - csstart, 0);
1201                         *((__sum16 *)(skb->data + csstart
1202                                 + skb->csum_offset)) = csum_fold(calc);
1203
1204                         csum = false;
1205                 } else {
1206                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1207                         skb_push(skb, 4);
1208                         memcpy(skb->data, &csum_preamble, 4);
1209                 }
1210         }
1211
1212         skb_push(skb, 4);
1213         tx_cmd_b = (u32)(skb->len - 4);
1214         if (csum)
1215                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1216         cpu_to_le32s(&tx_cmd_b);
1217         memcpy(skb->data, &tx_cmd_b, 4);
1218
1219         skb_push(skb, 4);
1220         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1221                 TX_CMD_A_LAST_SEG_;
1222         cpu_to_le32s(&tx_cmd_a);
1223         memcpy(skb->data, &tx_cmd_a, 4);
1224
1225         return skb;
1226 }
1227
1228 static const struct driver_info smsc95xx_info = {
1229         .description    = "smsc95xx USB 2.0 Ethernet",
1230         .bind           = smsc95xx_bind,
1231         .unbind         = smsc95xx_unbind,
1232         .link_reset     = smsc95xx_link_reset,
1233         .reset          = smsc95xx_reset,
1234         .rx_fixup       = smsc95xx_rx_fixup,
1235         .tx_fixup       = smsc95xx_tx_fixup,
1236         .status         = smsc95xx_status,
1237         .flags          = FLAG_ETHER | FLAG_SEND_ZLP,
1238 };
1239
1240 static const struct usb_device_id products[] = {
1241         {
1242                 /* SMSC9500 USB Ethernet Device */
1243                 USB_DEVICE(0x0424, 0x9500),
1244                 .driver_info = (unsigned long) &smsc95xx_info,
1245         },
1246         {
1247                 /* SMSC9505 USB Ethernet Device */
1248                 USB_DEVICE(0x0424, 0x9505),
1249                 .driver_info = (unsigned long) &smsc95xx_info,
1250         },
1251         {
1252                 /* SMSC9500A USB Ethernet Device */
1253                 USB_DEVICE(0x0424, 0x9E00),
1254                 .driver_info = (unsigned long) &smsc95xx_info,
1255         },
1256         {
1257                 /* SMSC9505A USB Ethernet Device */
1258                 USB_DEVICE(0x0424, 0x9E01),
1259                 .driver_info = (unsigned long) &smsc95xx_info,
1260         },
1261         {
1262                 /* SMSC9512/9514 USB Hub & Ethernet Device */
1263                 USB_DEVICE(0x0424, 0xec00),
1264                 .driver_info = (unsigned long) &smsc95xx_info,
1265         },
1266         {
1267                 /* SMSC9500 USB Ethernet Device (SAL10) */
1268                 USB_DEVICE(0x0424, 0x9900),
1269                 .driver_info = (unsigned long) &smsc95xx_info,
1270         },
1271         {
1272                 /* SMSC9505 USB Ethernet Device (SAL10) */
1273                 USB_DEVICE(0x0424, 0x9901),
1274                 .driver_info = (unsigned long) &smsc95xx_info,
1275         },
1276         {
1277                 /* SMSC9500A USB Ethernet Device (SAL10) */
1278                 USB_DEVICE(0x0424, 0x9902),
1279                 .driver_info = (unsigned long) &smsc95xx_info,
1280         },
1281         {
1282                 /* SMSC9505A USB Ethernet Device (SAL10) */
1283                 USB_DEVICE(0x0424, 0x9903),
1284                 .driver_info = (unsigned long) &smsc95xx_info,
1285         },
1286         {
1287                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1288                 USB_DEVICE(0x0424, 0x9904),
1289                 .driver_info = (unsigned long) &smsc95xx_info,
1290         },
1291         {
1292                 /* SMSC9500A USB Ethernet Device (HAL) */
1293                 USB_DEVICE(0x0424, 0x9905),
1294                 .driver_info = (unsigned long) &smsc95xx_info,
1295         },
1296         {
1297                 /* SMSC9505A USB Ethernet Device (HAL) */
1298                 USB_DEVICE(0x0424, 0x9906),
1299                 .driver_info = (unsigned long) &smsc95xx_info,
1300         },
1301         {
1302                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1303                 USB_DEVICE(0x0424, 0x9907),
1304                 .driver_info = (unsigned long) &smsc95xx_info,
1305         },
1306         {
1307                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1308                 USB_DEVICE(0x0424, 0x9908),
1309                 .driver_info = (unsigned long) &smsc95xx_info,
1310         },
1311         {
1312                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1313                 USB_DEVICE(0x0424, 0x9909),
1314                 .driver_info = (unsigned long) &smsc95xx_info,
1315         },
1316         {
1317                 /* SMSC LAN9530 USB Ethernet Device */
1318                 USB_DEVICE(0x0424, 0x9530),
1319                 .driver_info = (unsigned long) &smsc95xx_info,
1320         },
1321         {
1322                 /* SMSC LAN9730 USB Ethernet Device */
1323                 USB_DEVICE(0x0424, 0x9730),
1324                 .driver_info = (unsigned long) &smsc95xx_info,
1325         },
1326         {
1327                 /* SMSC LAN89530 USB Ethernet Device */
1328                 USB_DEVICE(0x0424, 0x9E08),
1329                 .driver_info = (unsigned long) &smsc95xx_info,
1330         },
1331         { },            /* END */
1332 };
1333 MODULE_DEVICE_TABLE(usb, products);
1334
1335 static struct usb_driver smsc95xx_driver = {
1336         .name           = "smsc95xx",
1337         .id_table       = products,
1338         .probe          = usbnet_probe,
1339         .suspend        = usbnet_suspend,
1340         .resume         = usbnet_resume,
1341         .disconnect     = usbnet_disconnect,
1342 };
1343
1344 static int __init smsc95xx_init(void)
1345 {
1346         return usb_register(&smsc95xx_driver);
1347 }
1348 module_init(smsc95xx_init);
1349
1350 static void __exit smsc95xx_exit(void)
1351 {
1352         usb_deregister(&smsc95xx_driver);
1353 }
1354 module_exit(smsc95xx_exit);
1355
1356 MODULE_AUTHOR("Nancy Lin");
1357 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1358 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1359 MODULE_LICENSE("GPL");